n. an estimate of how 'sketchy' or questionable something is.
v. to estimate how 'sketchy' or questionable something is.
undersketchtimate- to underestimate the level of 'sketchiness'
Bob- Nah man, that dude is straight.
Joe- Are you serious, bro? That guy is like 45 years old, has the scraggliest beard, and is clearly a meth dealer. You have the worst tendency to undersketchtimate.