"i caught my grandparents gumping last night, it was sick  "sarah blatantly gumped him last night""
"1: [sexual intercourse] between two [old people], without their [false teeth] in, a cross between "[humping]" and "[gumming]"  2: general [sex]"
""i caught my grandparents gumping last night, it was sick  "sarah blatantly gumped him last night""" What is the definition of "gumping"?