man alta

english variation of the german words "mann alter", which stands for "dude"/"oooh man"
just a quick way to express how disappointed u are

friend: bro seems like we are losing

you: oooh man alta

BBB

The full meaning on that abbreviation is "Big Black Bruh". It got popular after Dankus Memecus said it several times during his streams on HoI4. Actually, there is a point of view, that he was just stammering with the first "b"-letter, which created an effect of "b-b-bruh" that then transformed into BBB

*your teammates losing 8 tanks in one encirclement*
you: bbb