suspish verb 1adjective 1forms 3 verb1 •(slang) To be suspicious of; to suspect."Oh, boy, but you sure look some!" was drawn from one in frank approval. "Now that you're in his togs the guy's own mother wouldn't suspish you." — 1934 adjective1 •(slang) Clipping of suspicious.They've lived here a long time. Stranger-wise the folks are a bit suspish, but not of one of themselves. — 2000 formssuspished · suspishing · suspishes