lame excuse

• cop-outEvasion of responsibility
• alibiDefense of location
• pretextFabricated motive concealing truth
• flimsyWeak and easily damaged
• weakLacking power or force

pathetic · transparent · convenient · sorry · dodge · deflection · bullshit · cover · story · lie · fib · rationalization · justification · weasel · blame · shrug · halfhearted · unconvincing

• justificationsjustification, rationale, reason, excuse, explanation
• weak complaintswhine, whimper, grumble, mutter, gripe