noun
no romantic interest; just friends
Slang expression meaning there is no romantic spark or chance; literally 'no pulse'. Often used in dating contexts.
See also: 脈無し病
彼とは脈なしだと思う。
I think there's no romantic interest between us.
デートしたけど、脈なしだった。
We went on a date, but there was no spark.
Opposite meaning: 'there is a chance' or 'romantic interest exists'. 脈なし is the negative form.
From 脈 (pulse) + なし (without), literally 'no pulse'. Figuratively used in slang to mean no romantic interest or chance.