"Aces Up" or "Queens Up" means you have two pair but it is more specific in that it tells you the higher pair. For example, if you have Aces and Sevens, it is two pair and it is more specifically "Aces Up". The bottom pair is not specified, so Aces and Threes, for example, is also "Aces Up". So Wild Bill Hickock got shot holding "Aces Up".
It depends. Poker player terminology is different from the official hand rankings. Players make a distinction between 'a set' and 'trips'. The official name for it however is 'three of a kind'.
Same with two pair, the players' term is 'aces up' and the game term is 'two pair'. You can act any way you want, just as you can use either the player vocabulary or the game hand rankings. Nobody can force you to take their name convention, what's next someone correcting you when you say 'a three' instead of 'a trey' that those ESPN WSOP seem to like ? Or people berating you when you announce a straight and say 'no, you have a wheel/broadway you ****'
gl on the felts
Difference is when saying you have Aces up it means one of your two whole cards is an Ace and has paired with the other one on board. On a board of AJ479 rainbow, a player can say (s)he has "aces up" if (s)he has one of the following hands: AT, A4, A7, or A9.
The other combinations would ( J4, J7, J9, 47, 49, 79 ) would all be considered "two pair".
Hope this helps.
Aces up is two pair where one of the pairs is aces. It does not matter where any of the cards are located.
Also, two pair is two pair whether you call them aces up or not. However with three of a kind the distinction between a set and trips is important. A set is a stronger hand and plays completely differently than trips.
One of my pet peeves is when players analyzing or reporting on a hand say trips instead of set or vice-versa, because it drastically changes the dynamic of the hand.
The difference is when I have two pair - say Kings and Queens - the other guy has Aces up.