Guilt

Yes, it is and has been a verb.

Guilt
verb (used with object), Informal. 4. to cause to feel guilty (often followed by out or into): She totally guilted me out, dude. He guilted me into picking up the tab.

See also guilt-trip.



http://dictionary.reference.com/browse/guilt?s=t

I wouldn't use it unless your character would speak that way, and from the rest of that sentence, I don't think he/she would. Maybe it's just me but I tend to find nouns used as verbs annoying.

Just because you can do something does not mean you should. Sometimes turning a noun into a verb works well. Sometimes it sucks dead dust bunnies. Trust your ear.

I think it would work as dialogue

Verbing weirds language. Whether that is good or bad depends on if you are trying to be as clear as possible or convey a certain feeling by your choice of words.

http://www.gocomics.com/calvinandhobbes/1993/01/25

Let me put it this way. I would use it in dialogue, but only if I wanted to show that characters as someone who wasn't very educated, and who knew nothing about proper use of language.

I'm firmly in the Twig2 and Jamesaritchie camp.

English has suffixes that can be used to verbify a noun (See what I did there?) so that we don't need to banalify and weirderate a perfectly wonderful language. The knowledge of their existence and usage should be an absolutely basic part of education.

https://en.wiktionary.org/wiki/Category:English_verb-forming_suffixes

M.S. Wiggins said:

Acceptable as a verb, or not?

Example:

Memories of stepping on hot asphalt-gum must be what guilts him into wadding it up in a tissue instead.

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I vote yes. Even if it's not officially a verb, it fits the voice and tone of that sentence perfectly.

Fiction is not formal writing.

Roxxsmom said:

I vote yes. Even if it's not officially a verb, it fits the voice and tone of that sentence perfectly.

Fiction is not formal writing.

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And quite often we're writing dialogue by a character, or narrative exposition within the POV of a character who doesn't normally use the formally correct suffixes to verbify a noun.

In a context like that, using the nouny form of a verbed noun is a better fit for the voice and tone where using a suffixerated form would actually be bad fiction writing.