When a dating relationship is brutally derailed by submerged emotional issues unknown to either person. If the derailer is allowed a second chance by the derailed, its a Mulligan. Even more so it accompanied by a decent bitch slap.
Wes: Dude, I can't believe all this time I didn't realize I was a sad bastard with ungodly sorrow, projecting my emotional issues on you! Please bitch slap my issues back into my subconscious and give me a Mulligan.
Laura: Fine. Take me to a nice restaurant on Friday night and it'll be fine...SMACK!