Is when you spot a chick that you think is working with something, that looks good from far away and then when you get a closer look she ends up not meeting expectations
Damn! she look like she got a donk oh wait........never mind false alarm :-(
When your pants bunch up at the precise area in which you would usually store an erection thereby creating the illusion of arousal.
Generally speaking, discovery of such a false alarm usually comes at the hands of someone who is familiar with you nether regions and would feel comfortable enough testing it out.
I thought he'd finally gotten over his fear of intimacy so I went to grab and just got a handful of Levis... yup, it was just a false alarm.
false alarm boner, or FAB, is when someone says or acts seductively, then quickly ends it or sends bad signals
Person 1: Read this status: This sex, is sex, how sex, you sex, keep sex, a sex, dumb sex, ass sex, busy sex, for sex, 20 seconds. Read this again but don't say sex. ;)
Person 2: aw man i seriously had a false alarm boner going for a second