i smell bullshit - when you know someone is full of hot air and you're about to

when you know someone is full of hot air and you're about to pop them

'I didn't say anything bad about you.' I smell bullshit and I'm holding your text messages.

'You didn't ruin my plans.' I smell bullshit and I'm still stuck in traffic.

'You didn't forget our anniversary.' I smell bullshit and I'm holding the cake.