To stand or sit with a leg on each side of; bestride: straddle a horse. b. movement, motility, motion, move - a change of position that does not entail a change of. This Slang page is designed to explain what the meaning of straddle is. The slang word / phrase / acronym straddle means . Online Slang. But if someone says you're " straddling the fence", it means you're doing a different kind of splits: a change of position that does not entail a change of location.