Definition
'First base' is a slang term, primarily in North America, referring to a certain level of sexual intimacy. It usually means kissing, making out, or light touching above the waist. It's a way to talk about physical intimacy without being too explicit. It's often used humorously or casually among friends. It's one step on a figurative ladder of physical escalation. Understand that everyone has different boundaries, and consent is ALWAYS crucial.