Top definition
the name of one of BEAST/B2ST members...a new k-pop ban from cube ent. JYP's sister management group. Their first appereance as a group was in october 2009.

Yo seop is a blonde hair,talented,inoccente cute guy with an amazing voice♥
YoSeop oppa is so mine!! he looks like G-Dragon's lil bro...oww♥
by stumpidapirna January 11, 2010
Get the mug
Get a YoSeop mug for your daughter-in-law Riley.