A bit late, I know, but in case somebody wants to use Spanish terms, here are some words. Hope it helps.
She lost her clothes = "[Ella] perdió la ropa (literal translation)" or "[Ella] se quedó sin ropa (a little more frequent)"
Strip = "Desnudarse (by herself)" / "Desnudar (to strip another person)". Then you have some slang terms like "despelotarse", "encuerarse".
Strip poker = there is no translation, we say "strip poker".
Strip game = no translation for this either, we don't even have this in our vocabulary. If even, maybe "juegos picantes" (spicy games)
Stripping = another world that we don't really have in Spanish. We just use the verb.
Nude = "Desnuda (female)". Slang terms; "en cueros (both genders)", "encuerada", "en pelotas (no specific gender for this one, though)".
Skinny dip = Again, there is no translation for this one. Closest thing would be the verbs "bañarse" or "nadar" (bathe/swim) + the nude translations from above.
Flash = closest word would be "enseñar" (which also means "to teach", though). "Mostrar" would be appropiate.
Now, female clothing items, there are translation for all them. But I'm gonna put the words we use in Spain. Central and South American people may -and do- use different words;
*Clothing/clothes = ropa
*Shirt = camisa
*T-shirt = camiseta
*Blouse = blusa
*Belt = cinto/cinturón
*Pants/trousers = pantalón, pantalones
*Skirt = falda
*Underwear = ropa interior
*Bra = sujetador
*Panties = bragas. Thong = tanga. Boyshorts = culotte.
*Stockings = medias
*Pantyhose = pantimedias/pantis
*Garterbelt = liguero
Shower = "ducharse (verb)", "ducha (place where you take a shower or the act of taking a shower)"
Bath = "bañarse (verb)", "baño (the act of bathing. Also means "bathroom")"
Bikini = We just say "bikini"
Some more that can be useful;
Quitarse la ropa = to take one's own clothes off.
Quitarle la ropa = to take other's clothes off.
(replace "la ropa" with other term of clothing to specify which item of clothing is removed. Gender articles are another thing, but Google can solve it itself.)
Embarrassment = vergüenza (it means "shame", too)
Embarrassed = avergonzada (female)
If you want more Spanish terms, you only have to ask.
