This is term applies by the same rule of thumb as "Feather Plucker Syndrome" found in this same Urban Dictionary. There is one major difference... This 'Feather Plucker' is a mommy!
Get out of that smoke-filled bathroom with that baby, you mother feather plucker syndrome actin' bitch!
When you are doing your mother-in-law doggie-style you then jam it in her ass. As she turns around puckered from pain you donkey-punch her in the mouth. Making this the MOTHER-PUCKER PUNCH.
jaime: you are such the motherclucker.
michael: no I am not, just because i'm gay.
jaime: yeah but you did alex'smom and she is actually a guy.
michael: ok then, therefore I am both gay and a motherclucker.
jaime: that is affirmative.