You are just a wimpy nerd!Come on, don't be so wimpy.
wimpy
adjective feeble; afraid. From WIMP (a weak and timid person). Although the adjective was not recorded until the late 1960s, the Popeye the Sailor radio programme gave the US J. Wellington Wimpy, known simply as Wimpy, in 1936 US, 1967
wimpy
mod. weak; inept; square. You are just a wimpy nerd!