The correct spelling is "look-see".
To take a look-see means to check something out or to look at something.
According to the Oxford
English Dictionary, this term comes from Chinese "看見", each letter loosely translating to "look" and "see", and entered English via Chinese Pidgin English.
Other words and phrases with the same source include
"
long time no see" (很久不見 very long-time not see)
and
"chop chop" meaning "hurry up!" (速速 hurry hurry).