When a man accidentally ejaculates a little bit in his pants. It often occurs without significant reason or warning, and the man is aware enough to hold his load in after the inkling has come out. Overly sensitive men and pasty virgins are particularly prone to inklings, especially when they have a hunch. It is somewhat similar to a shart or a light tinkle from laughter or an amusement park ride, except with jizz instead of poop or urine, respectively.
Guy 1: No way man, Kobe is better.
Guy 2: Come on, Lebron is the—uhmff awww...
Guy 1: What the hell?
Guy 2: I just let out an inkling!
Guy 1: Dude...
Guy 2: I need to change my pants.