Thomas is your older brother, he suffers from; Tourette's Syndrome. He tics a lot, but he can't help it and he cusses because of it... One day when you and him were in Toy Safari and he blurted out on accident(he suffers from regular outbursts of swear words)

"SH-I-SHIT!!--"

Thomas blurted out, but realized you were standing next to him and quickly covers his mouth.