I watched it as a kid on vhs in the early 90’s. There was a man eating bugs throughout most of the movie. Moths specifically I believe. The only other detail I remember is him getting his belly slashed open by another character, which caused all the bugs to goop out of the wound all over the staircase. He may have had a lizard like tongue? About as gross as it gets anyways, but for some reason I’d like to watch it again! Thanks in advance!
Fright Night Part II (1988)
https://www.imdb.com/title/tt0097390/?ref_=nv_sr_1