Short for prophylactic, used before the term "condom" was coined. While the word prophylactic itself refers to anything used to prevent disease, such as toothbrushes, it was commonly used to refer to condoms and anti-STD ointments. When someone said "wear a pro," they meant you should put a condom on during sex.
The victory girls are on the loose and soon will cook some poor guy's goose! The G.I. Joes must be more wary of the diseases they may carry. Venereal disease is on the rise, so take your pros, be well and wise!
the stance in which one pretends to be neutral about bitcoin vs. other currencies, while subtly promoting it and/or downplaying any negative news about it.
Coindesk covers news about all cryptocurrencies, but it's really just a pro-bitcoinism outlet.