"Get sloshed" is one of the many, many slang phrases for "get drunk." You could say, for example, "get tipsy," "be five sheets to the wind," although there's many different numbers that different people use in that phrase. You could "be a little high." You could "be under the table." There are hundreds of slang terms for having too much to drink.
get tipsy
[ ほろ酔いになる、酔っぱらう
have three sheets to the wind
泥酔している、ひどく酔っている 数字はtwo both four など色々使える
under the table
酔いつぶれて、取引などが不正で
bomb
[ 大失敗、面白くないもの
=a play, film, event etc that is not successful:
laughingstock
[ 物笑いの種、笑いもの
=someone who is a laughing stock has done something so silly that people have no respect for them
Another phrase people use in the U.S. is that "it's OK to laugh 'with' people, but it's not right to laugh 'at' people."
laugh once in three years 男は三年に片頬(カタフ) 鹿児島のことわざらしいですね。 へらへら笑うな!男は三年に一度,笑うくらいでないといけない。