‘Big Bang’ Star Johnny Galecki — Mayim Bialik Is a ‘Tough’ Chick

081712_johnny_goleckiMayim Bialik is so tough … she returned to work just ONE DAY after her bloody car crash … so says her “Big Bang Theory” co-star Johnny Galecki.

Galecki was out in L.A. yesterday … rolling around in a pretty sick ride … when he was asked how Bialik was feeling after nearly losing a finger in a brutal car wreck Wednesday.

“She”s great man … she was at work today,” Johnny said.

“She”s a very tough dedicated girl.”

Bialik was sporting a cast on her right hand and bandages on her left forearm following the crash. She”s since tweeted saying, “Doing ok. Grateful. And tired.”