boy cuts used to be called short shorts (bdwb)

skivies (military term) are too long to be short shorts

80s short shorts were called hot pants

 true "nickers" (english) is the term for a  lads trouser that came just below the knee, and was 'bloused" below the knee and just below the top of the knee length calf sock ... they were in lieu of a full length slack. (trouser)
adopted in 1800s in america, to mean ladies undergarment or pantaloons,then changed to bloomers in the 1900s,, for men breech.later called britches...knickers are still available in most european countries.
1950s and 60s 3/4 pants were called "pedal pushers", in the 1990s and 2000+ now called capris. Changing times..when they first came out in the u.s. 1950s, everyone had them for 50 cents a pair and we wore them everywhere, they were known as thongs, a most comfortable footwear, sometime in the early 90s someone had the odasity to change the name to flip flops, notice two syllables, and give the name to something i cannot wear, and when i go to buy a new pair of my favorite footwear, i have to be name and politically correct.

a footnote...both spankies and boy shorts were made to be worn over an undergarment, and not as a wear alone item.