Remember MC Hammer and his hit song "U can't touch this". He never actually says "It's Hammer Time" in the song. He sings "Stop Hammer time" and "It's Hammer go Hammer". Just a little FYI.
Of course this funny music t-shirt doesn't say It's Hammer Time either, but instead it's Ramher Time, and if you're a man, it's time to buy this t-shirt to let the wife, girlfriend or potential good time know you're ready to ram her. In a good way.