Cramer's 'Mad Money Lightning Round': Shorts Overextended on Under Armour

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Here's what Jim Cramer had to say about some of the stocks that callers offered up during the "Mad Money Lightning Round" Monday evening:

Under Armour (UA Quote): The 37% short interest in the stock is "ridiculous," said Cramer. "This back-to-school season is going to be awesome. I know the stock is up a lot ... but you know what? I am sticking by it. I think that this stock -- and by the way, Crocs (CROX Quote) -- are two stocks that will go higher."

Atmel(ATML Quote): "An integrated-circuit play that has been sitting here under $5 for a long time, when I've got terrific stocks such as Texas Instruments (TXN Quote). ... I'd rather see you in Texas. I'd rather see you in, yes, Analog Devices (ADI Quote), but more important, I would rather see you in Intel (INTC Quote)."

Hansen Natural (HANS Quote): "I have to give it a Don'tBuy, because I can't figure out why it was up today."

American Electric (AEP Quote): "I think it's a well-run company, but I've got ConEd (ED Quote)," Cramer said, which is a better buy with a higher yield and more upside. "I'm steering you there. I don't want you to buy American Electric."

Terra Nitrogen (TNH Quote): "I'd rather see you in Deere (DE Quote) or Agrium (AGU Quote) or, don't forget, Monsanto (MON Quote). Those are better."