dubious tale;  cock-and-bull story;  questionable information;  taking care not to be fooled
 to call dibs;  to establish a claim; (lit.) to spit on (thus preventing others from taking it)
 to call dibs;  to establish a claim; (lit.) to spit on (thus preventing others from taking it)
 to keep one's wit about one;  to be on one's guard;  to be wary;  to keep on one's toes
 to keep one's wit about one;  to be on one's guard;  to be wary;  to keep on one's toes