Sentence:  Oftentimes you're embarrassed and don't want other people to know about it. You likely feel like crap and wish you had never put yourself out there in the first place. Shake it off, my friend. It's time to pull on your <WSD>big girl pants</WSD>. 
Meaning of the word marked with <WSD> tags:  A notional pair of trousers or underwear worn by a female when acting maturely.