To kiss one's fist and immediately or reluctantly punch someone you feel affection for or someone meaningful towards you. Sometimes leading them to bleed.
Me : A girl from my class kissed her fist and punched me.
Friend : That's a bloody knuckle kiss man, be lucky she only gave you a bloody nose.
Friend : That's a bloody knuckle kiss man, be lucky she only gave you a bloody nose.
by Mellow Merc December 14, 2018