The term "LooseyGoosey" vaguely means something is incomplete, or less than rigorous.  You might say a benefit of weakly-typed languages is that they allow a more LooseyGoosey approach to problem solving.  Then again, you might say a disadvantage of weakly-typed languages is that they allow a more LooseyGoosey approach to problemsolving.

See also: WabiSabi.