Can be attributed to, but not exclusively: excessive alcohol consumption, not getting laid in a long time, or the overthought of inadequacy.
B:'couldn't do it man i got the fuck fear.'
C:'Are you going to finally hit that tonight?'
D:'I think I'm gonna play it cool and leave it for a while'
C:'Bullshit! You got the fuck fear! Haha!'
D:'Fuck you, man.'