The ability that some possess to seemingly sense that a woman is a lesbian. Similar to gaydar but only in reference to whether a female is or is not gay.
"She’s a total dyke, the lesbidar is pinging off the scale."
by Tamara G February 16, 2005
similar to gaydar, but applying strictly to lesbians
"She has great lesbidar."
by angelvs February 16, 2005